Fixed bug with admin and Django 1.4
Fixed bug with admin and Django 1.4

promil23/django-hvad,piha/django-hvad,promil23/django-hvad,ojii/django-nani,philippeowagner/django-hvad,philippeowagner/django-hvad,vstoykov/django-hvad,ojii/django-nani,piha/django-hvad,vstoykov/django-hvad,hds/django-hvad,hds/django-hvad